Oligofructose and inulin for chronic inflammatory bowel disease
What it found
In small trials of people with bowel disease, a mix of oligofructose and inulin lowered gut inflammation and raised helpful bacteria.
Animal studies showed similar benefits, though one rat study found oligofructose alone did not help.
What they found
Studies in people
Ulcerative colitis in people
In a trial of 18 people with active ulcerative colitis, a mix of inulin, oligofructose, and probiotics lowered gut inflammation scores compared with a placebo. Gut biopsies showed less inflammation and more tissue repair.
Crohn's disease in people
Ten people with Crohn's disease took 15 g of an inulin and oligofructose mix daily for 21 days. Disease activity dropped, helpful gut bacteria rose, and immune markers shifted toward less inflammation.
Animal and lab studies
Colitis in rats
A mix of inulin and oligofructose at 5 g/kg body weight reduced gut inflammation in rats bred to develop colitis. It also raised levels of helpful gut bacteria and calming immune signals. The authors note this rat dose does not match what people take.
Oligofructose alone in rats
One study found that giving oligofructose by itself did not improve chemically induced gut inflammation in rats. Another prebiotic called galacto-oligosaccharides also failed to help in a different rat model.
Other findings
What prebiotics are
Prebiotics are plant-based food ingredients that the body cannot digest. They work by feeding specific helpful bacteria already living in the gut. Inulin and oligofructose come from chicory root.
What the authors conclude
- They say that changing gut bacteria with prebiotics like oligofructose holds promise for treating chronic bowel inflammation.
- They call for larger, carefully controlled trials in people to find out which prebiotics work best for different types of bowel disease.
- They note that prebiotics have few serious side effects, so there is little reason for patients with bowel disease to avoid them.
How it was done
Crohn's disease and ulcerative colitis affect up to 500 per 100,000 people in the Western world. Scientists think these diseases happen when the immune system reacts badly to normal gut bacteria in people with certain genes.
The authors gathered results from animal models of gut inflammation and small human trials. The human work included 18 patients with active ulcerative colitis and 10 patients with Crohn's disease. Patients took a mixture of inulin and oligofructose for 21 days or longer.
What it can’t tell you
- The human trials were very small, with only 10 to 18 patients, so they cannot prove the treatment works for everyone.
- A dose of 5 g/kg used in rats does not match what people would eat.
- Scientists do not yet know if oligofructose alone helps people, since it failed in one rat study but worked as part of a mix in others.
Who paid
- Funding
- Funded by CIHR (from the PubMed record).
- Authors work at
- University of Alberta, Canada
The paper
- Title
- Inulin and oligofructose in chronic inflammatory bowel disease
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Cite
- Leenen CH, Dieleman LA (2007). Inulin and oligofructose in chronic inflammatory bowel disease. The Journal of nutrition. doi:10.1093/jn/137.11.2572SFree full textPubMed 17951505DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error